DIY hydro - Runtz auto

Fine week. I'm really concern about mold so i defoliated to open the center in order to optimise the airflow between buds. Such tiny place (36x36x80) with one fan needs defoliation. They are fattening up, are fluffy, 21 colas, and expect each one to give 2+g of dry weed. I noticed a deficiency on top leaves...due to a bro's bachelor party: it sucked up all the remaining soup in 2 days, didn't checked the lvl of the solution before leaving... 5/6 buds are more advanced so i think i'll have to harvest in 2 times. It's running and it makes me happy ;)